{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["engineering feature", "application", "machanical property", "process parameter", "enabling technology", "material"], "input": "DMD melts metal wire by electron beam as feedstock used to form an object within a vacuum chamber ."}
{"engineering feature": [], "application": [], "machanical property": [], "process parameter": [], "enabling technology": [], "material": ["metal wire", "as"]}